Is the fact that there is generally no competition in aikido kind of a major factor in this equation? If you open up a "krotty" school and make credentials up, I think you have a much worse chance of getting away with it for too long.

It also hurts the legitimate schools because many perspective students in an area might get their (mis)information from one of the many duped students and former students.

...And if there is a health club in your area, you should try to get a satellite dojo in there!